defconfig: 8974: statically compile coresight event module

Statically compile the coresight event module to eliminate the
need to manually insert it and also for easier post-process parsing
of the collected trace.

Change-Id: I5d772e33ff6ad3ec5ea44f9c88905eeab7c01fc8
Signed-off-by: Sarang Joshi <spjoshi@codeaurora.org>